#!/bin/sh
#
#  githelpers - git command's customizations
#
#  to call them from your .gitconfig
#
#    an_alias = "!. ~/.githelpers && func_name_below"

# TODO update to trunk!
# TRUNK="trunk"
TRUNK="master"
PUB_REPO="origin"
SRC_REPO="upstream"
SRC_TRUNK="main"


#                  pretty_git_log
#
# Log output:
#
# * 51c333e    (12 days)    <Gary Bernhardt>   add vim-eunuch
#
# The time massaging regexes start with ^[^<]* because that ensures that
# they only operate before the first "<". That "<" will be the beginning
# of the author name, ensuring that we don't destroy anything in the
# commit message that looks like time.
#
# The log format uses } characters between each field, and `column` is
# later used to split on them. A } in the commit subject or any other
# field will break this.

HASH="%C(yellow)%h%Creset"
RELATIVE_TIME="%Cgreen(%ar)%Creset"
AUTHOR="%C(bold blue)<%an>%Creset"
REFS="%C(bold red)%d%Creset"
SUBJECT="%s"

FORMAT="$HASH}$RELATIVE_TIME}$AUTHOR}$REFS $SUBJECT"

ANSI_BLACK='\033[30m'
ANSI_BLACK_BOLD='\033[0;30;1m'
ANSI_RED='\033[31m'
ANSI_RED_BOLD='\033[0;31;1m'
ANSI_GREEN='\033[32m'
ANSI_GREEN_BOLD='\033[0;32;1m'
ANSI_YELLOW='\033[33m'
ANSI_YELLOW_BOLD='\033[0;33;1m'
ANSI_BLUE='\033[34m'
ANSI_BLUE_BOLD='\033[0;34;1m'
ANSI_MAGENTA='\033[35m'
ANSI_MAGENTA_BOLD='\033[0;35;1m'
ANSI_CYAN='\033[36m'
ANSI_CYAN_BOLD='\033[0;36;1m'
ANSI_WHITE='\033[37m'
ANSI_WHITE_BOLD='\033[0;37;1m'
ANSI_RESET='\033[0m'


show_git_head() {
    pretty_git_log -1
    git show -p --pretty="tformat:"
}

pretty_git_log() {
    git log --graph --pretty="tformat:${FORMAT}" $* |
        # Replace (2 years ago) with (2 years)
        sed -Ee 's/(^[^<]*) ago\)/\1)/' |
        # Replace (2 years, 5 months) with (2 years)
        sed -Ee 's/(^[^<]*), [[:digit:]]+ .*months?\)/\1)/' |
        # Line columns up based on } delimiter
        column -s '}' -t |
        # Color merge commits specially
        sed -Ee "s/(Merge (branch|remote-tracking branch|pull request) .*$)/$(printf $ANSI_RED)\1$(printf $ANSI_RESET)/" |
        # Page only if we're asked to.
        if [ -n "$GIT_NO_PAGER" ]; then
            cat
        else
            # Page only if needed.
            less --quit-if-one-screen --no-init --RAW-CONTROL-CHARS --chop-long-lines
        fi
}

git_repo_url() {
  git remote get-url ${SRC_REPO} 2>/dev/null ||
    git remote get-url ${PUB_REPO}
}

git_diff_local() {
  git log --oneline --no-merges ${PUB_REPO}/$(git rev-parse --abbrev-ref HEAD)..
}

git_diff_public() {
  git fetch &&
    git log --oneline --no-merges ${PUB_REPO}/$(git rev-parse --abbrev-ref HEAD)
}

git_diff_source() {
  git fetch &&
    git log --oneline --no-merges ${SRC_REPO}/$(git rev-parse --abbrev-ref HEAD)
}

git_catchup_source(){
  git fetch ${SRC_REPO} &&
    git rebase ${SRC_REPO}/${SRC_TRUNK}
}

#                  git_clean_pub_repo
#
# delete all local branches which have already been merged in PUB_REPO
git_clean_public_repo() {
  git fetch --all

  for branch in $(git branch --merged ${PUB_REPO}/${TRUNK} --format="%(refname:short)" |
                    # egrep -v "(${TRUNK}|rc)");do
                    grep -v -e ${TRUNK} -e rc);do
    git branch -d $branch
  done

  git remote prune ${PUB_REPO}
}


#                  git_prune_pub_repo
# delete all merged branches from PUB_REPO
git_prune_public_repo() {
  git push ${PUB_REPO} --delete $(git branch -r --merged ${PUB_REPO}/${TRUNK} |
                                    grep ${PUB_REPO} |
                                    grep -v -e '>' -e ${TRUNK} -e develop |
                                    # egrep -v '>|${TRUNK}|develop' |
                                    cut -d/ -f2-) 2>/dev/null ||
    echo "Nothing to delete"
}
